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329 lines
9.0 KiB
Perl
329 lines
9.0 KiB
Perl
# File: DualIndexHashObject.pm
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# Author: pragma_
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#
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# Purpose: Provides a hash-table object with an abstracted API that includes
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# setting and deleting values, saving to and loading from files, etc.
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package PBot::DualIndexHashObject;
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use warnings;
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use strict;
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use feature 'unicode_strings';
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use Text::Levenshtein qw(fastdistance);
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use JSON;
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use Carp ();
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sub new {
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if (ref($_[1]) eq 'HASH') {
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Carp::croak("Options to DualIndexHashObject should be key/value pairs, not hash reference");
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}
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my ($class, %conf) = @_;
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my $self = bless {}, $class;
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$self->initialize(%conf);
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return $self;
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}
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sub initialize {
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my ($self, %conf) = @_;
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$self->{name} = delete $conf{name} // 'Dual Index hash object';
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$self->{filename} = delete $conf{filename} // Carp::carp("Missing filename to DualIndexHashObject, will not be able to save to or load from file.");
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$self->{pbot} = delete $conf{pbot} // Carp::croak("Missing pbot reference to " . __FILE__);
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$self->{hash} = {};
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}
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sub hash_add {
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my ($self, $primary_index_key, $secondary_index_key, $hash) = @_;
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if (defined $hash) {
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if (exists $self->hash->{$primary_index_key}->{$secondary_index_key}) {
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return undef;
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}
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foreach my $key (keys %$hash) {
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$self->hash->{$primary_index_key}->{$secondary_index_key}->{$key} = $hash->{$key};
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}
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return 1;
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}
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return undef;
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}
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sub load {
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my ($self, $filename) = @_;
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$filename = $self->filename if not defined $filename;
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if (not defined $filename) {
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Carp::carp "No $self->{name} filename specified -- skipping loading from file";
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return;
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}
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$self->{pbot}->{logger}->log("Loading $self->{name} from $filename ...\n");
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if (not open(FILE, "< $filename")) {
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Carp::carp "Skipping loading from file: Couldn't open $filename: $!\n";
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return;
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}
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my $contents = do {
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local $/;
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<FILE>;
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};
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$self->{hash} = decode_json $contents;
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close FILE;
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}
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sub save {
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my $self = shift;
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my $filename;
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if (@_) { $filename = shift; } else { $filename = $self->filename; }
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if (not defined $filename) {
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Carp::carp "No $self->{name} filename specified -- skipping saving to file.\n";
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return;
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}
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$self->{pbot}->{logger}->log("Saving $self->{name} to $filename\n");
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my $json = JSON->new;
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my $json_text = $json->pretty->canonical->utf8->encode($self->{hash});
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open(FILE, "> $filename") or die "Couldn't open $filename: $!\n";
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print FILE "$json_text\n";
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close FILE;
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}
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sub clear {
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my $self = shift;
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$self->{hash} = {};
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}
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sub find_index {
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my $self = shift;
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my ($primary_index_key, $secondary_index_key) = map {lc} @_;
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return undef if not defined $primary_index_key;
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return undef if not exists $self->hash->{$primary_index_key};
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return $primary_index_key if not defined $secondary_index_key;
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foreach my $index (keys %{ $self->hash->{$primary_index_key} }) {
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return $index if $secondary_index_key eq lc $index;
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}
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return undef;
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}
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sub levenshtein_matches {
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my ($self, $primary_index_key, $secondary_index_key, $distance, $strictnamespace) = @_;
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my $comma = '';
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my $result = "";
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$distance = 0.60 if not defined $distance;
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$primary_index_key = '.*' if not defined $primary_index_key;
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if (not $secondary_index_key) {
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foreach my $index (sort keys %{ $self->hash }) {
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my $distance_result = fastdistance($primary_index_key, $index);
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my $length = (length($primary_index_key) > length($index)) ? length $primary_index_key : length $index;
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if ($distance_result / $length < $distance) {
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if ($index =~ / /) {
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$result .= $comma . "\"$index\"";
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} else {
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$result .= $comma . $index;
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}
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$comma = ", ";
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}
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}
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} else {
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my $primary = $self->find_index($primary_index_key);
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if (not $primary) {
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return 'none';
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}
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my $last_header = "";
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my $header = "";
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foreach my $index1 (sort keys %{ $self->hash }) {
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$header = "[$index1] ";
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$header = "[global channel] " if $header eq "[.*] ";
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if ($strictnamespace) {
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next unless $index1 eq '.*' or $index1 eq $primary;
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$header = "" unless $header eq '[global channel] ';
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}
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foreach my $index2 (sort keys %{ $self->hash->{$index1} }) {
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my $distance_result = fastdistance($secondary_index_key, $index2);
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my $length = (length($secondary_index_key) > length($index2)) ? length $secondary_index_key : length $index2;
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if ($distance_result / $length < $distance) {
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$header = "" if $last_header eq $header;
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$last_header = $header;
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$comma = '; ' if $comma ne '' and $header ne '';
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if ($index2 =~ / /) {
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$result .= $comma . $header . "\"$index2\"";
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} else {
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$result .= $comma . $header . $index2;
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}
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$comma = ", ";
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}
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}
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}
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}
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$result =~ s/(.*), /$1 or /;
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$result = 'none' if $comma eq '';
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return $result;
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}
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sub set {
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my ($self, $primary_index_key, $secondary_index_key, $key, $value, $dont_save) = @_;
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my $primary = $self->find_index($primary_index_key);
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if (not $primary) {
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my $result = "No such $self->{name} object [$primary_index_key]; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index_key);
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return $result;
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}
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my $secondary = $self->find_index($primary, $secondary_index_key);
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if (not $secondary) {
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my $secondary_text = $secondary_index_key =~ / / ? "\"$secondary_index_key\"" : $secondary_index_key;
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my $result = "No such $self->{name} object [$primary_index_key] $secondary_text; similiar matches: ";
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$result .= $self->levenshtein_matches($primary, $secondary_index_key);
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return $result;
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}
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if (not defined $key) {
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my $secondary_text = $secondary =~ / / ? "\"$secondary\"" : $secondary;
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my $result = "[" . ($primary eq '.*' ? 'global' : $primary) . "] $secondary_text keys:\n";
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my $comma = '';
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foreach my $key (sort keys %{ $self->hash->{$primary}->{$secondary} }) {
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$result .= $comma . "$key => " . $self->hash->{$primary}->{$secondary}->{$key};
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$comma = ";\n";
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}
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$result .= "none" if ($comma eq '');
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return $result;
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}
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if (not defined $value) {
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$value = $self->hash->{$primary}->{$secondary}->{$key};
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} else {
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$self->hash->{$primary}->{$secondary}->{$key} = $value;
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$self->save unless $dont_save;
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}
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$primary = 'global' if $primary eq '.*';
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$secondary = "\"$secondary\"" if $secondary =~ / /;
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return "[$primary] $secondary: '$key' " . (defined $value ? "set to '$value'" : "is not set.");
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}
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sub unset {
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my ($self, $primary_index_key, $secondary_index_key, $key) = @_;
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my $primary = $self->find_index($primary_index_key);
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if (not $primary) {
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my $result = "No such $self->{name} object group '$primary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index_key);
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return $result;
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}
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my $secondary = $self->find_index($primary, $secondary_index_key);
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if (not $secondary) {
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my $result = "No such $self->{name} object '$secondary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary, $secondary_index_key);
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return $result;
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}
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delete $self->hash->{$primary}->{$secondary}->{$key};
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$self->save();
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$primary = 'global' if $primary eq '.*';
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$secondary = "\"$secondary\"" if $secondary =~ / /;
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return "[$self->{name}] ($primary) $secondary: '$key' unset.";
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}
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sub add {
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my ($self, $primary_index_key, $secondary_index_key, $hash) = @_;
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if ($self->hash_add($primary_index_key, $secondary_index_key, $hash)) {
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$self->save();
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} else {
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return "Error occurred adding new $self->{name} object.";
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}
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return "'$secondary_index_key' added to $primary_index_key [$self->{name}].";
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}
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sub remove {
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my ($self, $primary_index_key, $secondary_index_key) = @_;
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my $primary = $self->find_index($primary_index_key);
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if (not $primary) {
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my $result = "No such $self->{name} object group '$primary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index_key);
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return $result;
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}
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if (not $secondary_index_key) {
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delete $self->hash->{$primary};
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$self->save;
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return "'$primary' group removed from $self->{name}.";
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}
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my $secondary = $self->find_index($primary, $secondary_index_key);
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if (not $secondary) {
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my $result = "No such $self->{name} object '$secondary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary, $secondary_index_key);
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return $result;
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}
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delete $self->hash->{$primary}->{$secondary};
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# remove primary group if no more secondaries
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if (scalar keys %{ $self->hash->{$primary} } == 0) {
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delete $self->hash->{$primary};
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}
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$self->save();
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return "'$secondary' removed from $primary group [$self->{name}].";
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}
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# Getters and setters
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sub hash {
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my $self = shift;
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return $self->{hash};
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}
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sub filename {
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my $self = shift;
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if (@_) { $self->{filename} = shift; }
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return $self->{filename};
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}
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1;
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